Allocation of Resources Without Limits or Throttling in Next.js - CVE-2026-44577
Published: May 6, 2026
Vulnerability identifier: #VU130278
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44577
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the Image Optimization API when handling requests to the /_next/image endpoint for large local assets matching configured local patterns. A remote attacker can request large local assets to cause a denial of service.
Only self-hosted deployments using the default image loader are vulnerable. By default, all local patterns are allowed.
Affected software
Next.js
How to mitigate CVE-2026-44577
Install security update from vendor's website.
Next.js - addressed in versions 15.5.16, 16.2.5